Re: PTR Records

MC <mccato@xxxxxxxxxxx> wrote:
> Thanks so much, Kevin. I've made those changes; and I have another
> question, if you don't mind. I created an SPF record, but it has mx
> in there twice. I looked at some SPF records for other domains, and
> didn't see that in their records. Will you take a look at it and see
> if looks correct? Here it is:
>
> v=spf1 ip4:168.9.128.0/19 mx a:168.9.128.29 a:168.9.128.195
> a:168.9.128.204 a:168.9.128.36 mx:dewey.cowetaschools.net ~all
>
> All of these changes didn't seem to fix the problem we're having
> sending email to AOL and Compuserve, though. The strange thing is
> that one of our 3 email servers can send mail to them; the other 2
> cannot. The error I see in the ESM is "an SMTP protocol error
> occurred", so I guess the PTR records are still not right. For some
> reason, we have a ton of PTR records that point to
> mail.coweta....that have ips that I don't recognize. Should there
> just be the one record for dewey in there? I don't know why all those
> other entries would be there.

You didn't mention that you have three mail servers, that makes a big
difference, if the mail server does not have an MX record for the domain it
is sending for it must be listed in the SPF record and it must have a PTR
record, just as the MX server does.

I'd really recommend having an MX record for all mail servers, provided all
three mail servers can receive mail for these domains. You should set them
up just like you did this one, keeping in mind the mail servers' name in its
HELO name should match the name in the MX record, should have an A record
for the name and a PTR record for its IP that gives the same name. Assuming
these are Exchange servers they should know where to route the mail for each
user.




--
Best regards,
Kevin D. Goodknecht Sr. [MVP]
Hope This Helps
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